Endothermic and Exothermic Reactions Quiz

What is an endothermic reaction?

• A reaction that releases energy in the form of heat.

• A reaction that absorbs energy from its surroundings.

• A reaction that neither absorbs nor releases energy.

• A reaction that only occurs in living organisms.

What is an exothermic reaction?

• A reaction that absorbs energy from its surroundings.

• A reaction that releases energy in the form of heat.

• A reaction that requires a catalyst to occur.

• A reaction that only occurs in plants.

Which of the following indicates an energy change in a chemical reaction?

• Change in colour.

• Change in temperature.

• Change in state.

• Change in smell.

How do endothermic and exothermic reactions differ in terms of energy?

• Endothermic reactions release energy, while exothermic reactions absorb energy.

• Endothermic reactions absorb energy, while exothermic reactions release energy.

• Both absorb energy.

• Both release energy.

Which of the following is a real-world example of an exothermic reaction?

• Melting ice.

• Photosynthesis.

• Combustion of petrol.

• Evaporation of water.

Which of the following is a real-world example of an endothermic reaction?

• Freezing of water.

• Respiration in animals.

• Baking bread.

• Dissolving ammonium nitrate in water.

What does a reaction diagram for an exothermic reaction typically show?

• Products have higher energy than reactants.

• Reactants have higher energy than products.

• Energy remains constant.

• Energy decreases and then increases.

What does a reaction diagram for an endothermic reaction typically show?

• Products have higher energy than reactants.

• Reactants have higher energy than products.

• Energy remains constant.

• Energy increases and then decreases.

Which practical experiment can demonstrate an exothermic reaction?

• Mixing vinegar and baking soda.

• Dissolving salt in water.

• Burning magnesium ribbon.

• Melting chocolate.

Which practical experiment can demonstrate an endothermic reaction?

• Mixing vinegar and baking soda.

• Dissolving ammonium chloride in water.

• Burning a candle.

• Freezing water.